"sand nigger" meaning in Anglais

{
  "categories": [
    {
      "kind": "other",
      "name": "Compositions en anglais",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Locutions nominales en anglais",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Anglais",
      "orig": "anglais",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    "Composé de sand (« sable ») et de nigger (« nègre »)."
  ],
  "forms": [
    {
      "form": "sand niggers",
      "tags": [
        "plural"
      ]
    }
  ],
  "lang": "Anglais",
  "lang_code": "en",
  "pos": "noun",
  "pos_title": "Locution nominale",
  "related": [
    {
      "word": "sandnigger"
    },
    {
      "word": "sand-nigger"
    }
  ],
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Insultes en anglais",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Termes péjoratifs en anglais",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Termes vulgaires en anglais",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Personne originaire du Moyen-Orient ou du nord de l’Afrique."
      ],
      "id": "fr-sand_nigger-en-noun-gyXJDfzQ",
      "raw_tags": [
        "Raciste"
      ],
      "tags": [
        "offensive",
        "pejorative",
        "vulgar"
      ]
    }
  ],
  "word": "sand nigger"
}

{
  "categories": [
    "Compositions en anglais",
    "Locutions nominales en anglais",
    "anglais"
  ],
  "etymology_texts": [
    "Composé de sand (« sable ») et de nigger (« nègre »)."
  ],
  "forms": [
    {
      "form": "sand niggers",
      "tags": [
        "plural"
      ]
    }
  ],
  "lang": "Anglais",
  "lang_code": "en",
  "pos": "noun",
  "pos_title": "Locution nominale",
  "related": [
    {
      "word": "sandnigger"
    },
    {
      "word": "sand-nigger"
    }
  ],
  "senses": [
    {
      "categories": [
        "Insultes en anglais",
        "Termes péjoratifs en anglais",
        "Termes vulgaires en anglais"
      ],
      "glosses": [
        "Personne originaire du Moyen-Orient ou du nord de l’Afrique."
      ],
      "raw_tags": [
        "Raciste"
      ],
      "tags": [
        "offensive",
        "pejorative",
        "vulgar"
      ]
    }
  ],
  "word": "sand nigger"
}